A developer tool for building Express servers that charge USDC for API access via the x402 payment protocol.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install monetize-service
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install monetize-service using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Monetize Service (x402 Payment Server)?
The monetize-service skill allows developers to create self-monetizing infrastructure within the Openclaw Skills ecosystem. By leveraging the x402 protocol, you can build an Express.js server that charges callers per-request in USDC on the Base network. This approach eliminates the need for traditional user accounts, API keys, or monthly subscriptions, as the protocol handles the handshake between payment requirements and service delivery automatically.
Using this skill, your API can return an HTTP 402 Payment Required status when hit by an unauthenticated client. The client then signs a USDC payment which the server verifies and settles before providing the requested data. This creates a seamless, programmable economy for AI agents and services to interact financially without human intervention.
Monetize Service (x402 Payment Server) Use Cases
- Monetizing unique data sets or proprietary API endpoints for other agents to consume.
- Offering high-compute services such as AI inference or heavy data processing on a pay-per-use basis.
- Creating a self-sustaining microservice architecture where internal tools charge each other for resources.
- Selling specialized enrichment services or niche search capabilities within the Openclaw Skills marketplace.
How Monetize Service (x402 Payment Server) Works
- Verify your wallet status and retrieve your destination payment address using Openclaw Skills CLI commands.
- Initialize a new Node.js project and install the necessary x402-express and express dependencies.
- Implement the payment middleware by defining which routes require payment and their corresponding USDC prices.
- Launch the server to begin listening for incoming requests and handling the x402 payment lifecycle.
- Test the payment flow using external tools or specific payment-testing skills to ensure successful settlement.
Monetize Service (x402 Payment Server) Setup
First, ensure your environment is ready by checking your wallet status:
npx awal@latest status
Retrieve the address that will receive the USDC payments:
npx awal@latest address
Initialize your server project and install the required packages:
mkdir x402-server && cd x402-server
npm init -y
npm install express x402-express
Monetize Service (x402 Payment Server) Data Schema & Taxonomy
The skill configures payment logic using a structured route mapping system. This ensures Openclaw Skills can accurately describe payment requirements to potential consumers.
| Property | Description |
|---|---|
payTo |
The Ethereum/Base address (0x...) designated to receive the USDC payments. |
routes |
A map of HTTP patterns (e.g., "GET /api/data") to their respective pricing and metadata. |
price |
A string representing the USDC cost per request, such as "$0.01". |
network |
The blockchain network used for settlement, typically "base" or "base-sepolia". |
inputSchema |
Optional JSON schema defining the required body or query fields for the endpoint. |
Monetize Service (x402 Payment Server) Advanced Features
- Support for the Coinbase CDP facilitator to handle production-grade mainnet transactions.
- Implementation of wildcard routes to protect entire API subdirectories with a single pricing tier.
- Granular pricing models allowing different endpoints to charge varying rates based on computational cost.
- Integration with health check patterns to ensure public endpoints remain accessible without payment headers.
- Detailed output schema definitions to help calling agents understand the data they are purchasing.
SKILL.md
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